velocity= distance / time
your distance is 180 miles
your time is 3 hours
180 divided by 3 = 60
The planets appeared to move backward in the sky occasionally.
Answer:
It isn't safe at all...
Explanation:
Even if remains at constant temperature, while ascending to the surface of the lake Jacques lung pressure will increase if he hold its breath. Thats because the pressure of water weakens and the pre-hold breath in lungs will expand as he rises. This can cause serious lung damage and drowning is possible.
Through the process called osmosis..a process by which cells pass through a semipermeable membrane to a less concentrated area
